Midterm Review Chemistry

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its identity, such as color, shape, or boiling point.

Front

What is the charge of an ion with 10 protons, 12 neutrons, and 11 electrons?

Back

-1

Front

Write the electron configuration for sodium (Na, Atomic #=11).

Back

1s² 2s² 2p⁶ 3s¹

Front

What is the definition of an independent variable?

Back

The variable you are testing or changing in an experiment.

Front

Which element has the largest atomic radius: Fluorine (F), Francium (Fr), or Helium (He)?

Back

Francium (Fr)

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to change into different substances, such as flammability or reactivity.

Tags

NGSS.MS-PS1-1

Front

Define atomic number.

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Tags

NGSS.MS-PS1-5

Front

What is the pH scale?

Back

A scale used to measure the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.